Histologic Sequelae of Apical Hypertrophic Cardiomyopathy: Dystrophic Calcification

Shahryar G Saba1,2, John N Makaryus1, Navid Rahmani2

  • 1Multimodality Cardiovascular Imaging Laboratory, Department of Cardiology, Hofstra Northwell School of Medicine, Manhasset, NY, USA.

Insights

Cardiac computed tomography (CT) reveals apical hypertrophic cardiomyopathy with calcification. This suggests chronic injury, not atherosclerotic coronary artery disease, causes apical dysfunction, highlighting CT

Area of Science:

  • Cardiology
  • Medical Imaging
  • Cardiovascular Disease

Background:

  • Apical hypertrophic cardiomyopathy is a form of heart muscle disease.
  • Dystrophic calcification can occur in injured myocardial tissue.
  • Distinguishing causes of apical myocardial dysfunction is clinically important.

Purpose of the Study:

  • To present cardiac computed tomography (CT) findings in apical hypertrophic cardiomyopathy.
  • To investigate the etiology of apical myocardial dysfunction in this condition.
  • To evaluate the role of CT in visualizing myocardial calcification.

Main Methods:

  • Cardiac computed tomography (CT) was used to assess left ventricular apex morphology.
  • Coronary CT angiography was performed to evaluate epicardial coronary arteries.
  • Analysis focused on identifying hypertrophic cardiomyopathy, calcification, and coronary artery disease.

Main Results:

  • Cardiac CT demonstrated apical hypertrophic cardiomyopathy with dystrophic calcification of the left ventricular apex.
  • Coronary CT angiography showed no significant epicardial coronary artery disease.
  • Findings suggest increased wall tension and reduced microvascular perfusion contribute to apical dysfunction.

Conclusions:

  • Cardiac CT is valuable for diagnosing apical hypertrophic cardiomyopathy and associated calcification.
  • The findings support non-atherosclerotic mechanisms for apical myocardial injury.
  • CT imaging is effective for visualizing calcium deposition in chronically injured myocardium.

Related Concept Videos

Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
574
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
673
Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
1.1K
Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
702
Rheumatic Heart Disease I: Introduction01:23

Rheumatic Heart Disease I: Introduction

Rheumatic heart disease or RHD is a chronic condition that results from rheumatic fever, causing permanent damage to the heart valves.Etiology and Risk FactorsIt primarily arises from rheumatic fever, an inflammatory disease that can develop after untreated or inadequately treated group A streptococcal (GAS) pharyngitis. Streptococcus spreads through direct contact with oral or respiratory secretions. While the bacteria are the causative agents, factors like malnutrition, overcrowding, poor...
647
Myocarditis I: Introduction01:21

Myocarditis I: Introduction

Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
498